diff --git a/equi/equi-stratum.cpp b/equi/equi-stratum.cpp
index 2670fbcb5..ae2e0d967 100644
--- a/equi/equi-stratum.cpp
+++ b/equi/equi-stratum.cpp
@@ -292,7 +292,7 @@ bool equi_stratum_submit(struct pool_infos *pool, struct work *work)
 	}
 	cbin2hex(solhex, (const char*) work->extra, 1347);
 
-    char* solHexRestore = (char*) calloc(128, 1);
+    char* solHexRestore = (char*) calloc(129, 1);
     cbin2hex(solHexRestore, (const char*)&work->solution[8], 64);
     memcpy(&solhex[6+16], solHexRestore, 128);